vb.net首字大写,vb大写函数

vb.net 中如何处理输入小写变大写

可以试着用典型的VB字符串函数UCase解决。

比如先把输入的内容放到字符串A$中，若A$="a",则经

A$=UCase(A$)转换后，结果即是A$="A"。

我在程序中是这麽处理的。行不行，试试就知道了。

vb.net大小写字母转换

Private Sub Button6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button6.Click

Dim s As String = "0Ff0ajkh04624F"

Dim i As Integer = 0

Dim sTemp As String = ""

Dim ss As String = ""

For i = 1 To Strings.Len(s)

sTemp = Mid(s, i, 1)

If Asc(sTemp) = 65 And Asc(sTemp) = 90 Then

sTemp = LCase(sTemp)

ElseIf Asc(sTemp) = 95 And Asc(sTemp) = 122 Then

sTemp = UCase(sTemp)

Else

sTemp = sTemp

End If

ss = ss sTemp

Next

MsgBox(ss)

End Sub

修改VB程序：首字母大写

修改不大容易，干脆给你写一个吧。建一个Text1，Command1。

代码如下。

＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

Private Sub Command1_Click()

Const ascla = 97 'Asc("a")

Const asclz = 122 'Asc("z")

Const ascuA = 65 'Asc("A")

Const ascuZ = 90 'Asc("Z")

Dim i As Long, t As String, ascii As Integer

t = Text1.Text

If Asc(Left(t, 1)) = ascla And Asc(Left(t, 1)) = asclz Then t = UCase(Left(t, 1)) Mid(t, 2)

For i = 2 To Len(t)

ascii = Asc(Mid(t, i, 1))

If ascii = ascla And ascii = asclz Then

Dim ascl As Integer

ascl = Asc(Mid(t, i - 1, 1))

If ascl ascuA Or (ascl ascuZ And ascl ascla) Or ascl asclz Then

t = Left(t, i - 1) UCase(Mid(t, i, 1)) Mid(t, i + 1)

End If

End If

Next

Text1.Text = t

End Sub

vb.net text.box 如何实现输入的小写转变为大写

1：将文件拷贝到WORD中

2：点击菜单“格式”——更改大小写，出现对话框

3：可以选择“大写”或者“切换大小写”，就都可以换过来了

最后，再复制回到你所需要的文档中即可！

首字母变成大写，用VB怎么写

Private Sub Command1_Click()

Dim a As String, b As String

a = Text1.Text

b = Right(a, Len(a) - 1)

a = UCase(Left(a, 1))

Text1.Text = a b

End Sub一个text控件。一个command控件。len函数（string）求字符串的字符长度。left（string，n）从string字符串左边开始取n个字符。right（string，n）从string字符串右边开始取n个字符。ucase（string） 将字符串string中所有小写字母改成大写。Private Sub Text1_LostFocus()

Dim a As String, b As String

a = Text1.Text

b = Right(a, Len(a) - 1)

a = UCase(Left(a, 1))

Text1.Text = a b

End Sub lostfocus 焦点离开事件。 在text中输入字母后。当鼠标点击别的按钮时，text控件失去焦点。触发事件。也可以按tab键使text失去焦点。